Best Ever Brownie Frosting

RECIPE BY: San

DATE: May 7, 2026

Total Time 10 minutes

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This is the Best Ever Brownie Frosting, and I am not messing around. Rich and fudge-like, this frosting is insanely delicious! Get ready to lick the bowl clean.

This rich chocolate frosting is silky smooth and simple to make. Taking just 10 minutes to make, and it will add a layer of wow to your brownies that everyone will love.

stack of frosted brownies

My dad made this Best Ever Brownie Frosting recipe for as long as I can remember. I have never had a brownie that was better than my dad’s. When I got into college, I decided it was time to learn to make my dad’s brownies.

As I phoned my dad and asked for the frosting recipe, he was delighted that I wanted to make them. What surprised me, even more, was him telling me it could be made in a microwave – this gave me less of an opportunity to ruin it! So then, I asked about his brownie recipe – something unexpected happened. My father informed me he used a ready-made brownie mix?! Unbelievable!!! My dad used a brownie mix! WHAT???

overhead shot of frosted brownies

Honestly, I was shocked; how could this be? Why, why on earth did I think they were homemade? Because they were my dad’s brownies. He said he always just used Ghiradelli brownie mixes and then made homemade frosting to give it that homemade taste. Well, it is the frosting that makes it oh, so amazing! His brownies, to me, are still the bomb and can’t be beaten.

Since then, I have used Ghiradelli brownie mixes just like my dad’s brownie frosting. I also use the same brownie mixes in my Fudge Brownie No-Bake Cheesecake; it’s one of my absolute favorite recipes.

I have continued to make my dad’s brownies throughout the year. And everyone loves this best-ever brownie frosting. So while I would top a chocolatey brownie with anything else, you could add sprinkles on top of this chocolate frosting; my girls sure love them this way.

close up shot of frosted brownies

what frosting is best for brownies

There are lots of frosting options for brownies, but this Best Ever Brownie Frosting is my favorite because it’s easy to make and perfectly rich without overpowering the brownies. buttercream frosting or chocolate whipped cream also make delicious toppings.

Simple Frosting Ingredients

  • Butter
  • Buttermilk
  • Cocoa powder
  • Vanilla
  • Powdered sugar
overhead shot of chocolate frosting ingredients

I had to know where my dad got this recipe for brownie frosting, I mean, he is a fantastic cook, but he has never just made up a dessert recipe; he does make a lot of savory dishes, but sweet ones he always has a recipe.

I was not surprised when he said he got the recipe from Jean, one of our longtime family friends. Jean does have some of the best dessert recipes. I am utterly obsessed with her recipe for Pumpkin Bars.

stack of brownies

Let me tell you this brownie frosting elevates your brownies in that it makes them irresistible. Trust me when I say you won’t have any self-restraint and end up licking the bowl clean – that’s what I do every single time!

pin to pinterest.

brownie frosting collage image with recipe title

Best Ever Brownie Frosting

Prep: 5 minutes
Cook: 5 minutes
Total: 10 minutes
Servings: 24
Calories: 112 kcal
This is the Best Ever Brownie Frosting and I am not messing around. Rich and fudge-like, this frosting is mouthwateringly delicious!

Video

Ingredients
 

  • 1/2 cup butter
  • 6 tablespoons buttermilk
  • 4 tablespoons cocoa powder
  • 1 tablespoon vanilla
  • 3 3/4 cups powdered sugar also equals 1 lb.

Instructions
 

  • In a medium glass mixing bowl add butter and cover with a plate and heat butter for 1 minute in the microwave. Remove from microwave and remove lid. Stir in vanilla and buttermilk, place back in the microwave and heat for 30 seconds, stir, then heat for another 30 seconds, stir, heat for 30 seconds and stir and then heat for another 30 seconds.
  • Remove from microwave and stir in cocoa and powder sugar, until well combined. Place back in the microwave and heat for 30 seconds, stir. Heat for another 30 seconds and stir, repeat 1more time if needed, until frosting is smooth and there are no clumps. Pour over brownies, and spread evenly. Let frosting cool and harden.

Calories: 112kcalCarbohydrates: 19gFat: 4gSaturated Fat: 2gCholesterol: 10mgSodium: 38mgPotassium: 17mgSugar: 18gVitamin A: 125IUCalcium: 7mgIron: 0.1mg

Tried this recipe?Let us know what you think!

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4.75 from 27 votes (18 ratings without comment)

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76 Comments

  1. That fast?! I am SO going to have to make a bowl of this tonight. Maybe I’ll even make brownies to put it on… or maybe I’ll just grab a big ol’ spoon. 🙂

  2. I was in the middle of making this recipe when I realized that the ingredients list does not include how much powdered sugar. ARGH!!!!! I poured, and poured, and poured about 2.5 cups and wsa not sure how thick it should have been so i stopped adding it for fear of it being too sweet. It is in the refrigerator now to get hard quicker – I hope it tastes okay. It is needed tonight for a fund raiser!

  3. Thank it for sharing the recipe! I didn’t have buttermilk so I used whole milk and it turned out great!
    We made brownies for my son’s party happening later today. We topped a pan of brownies with your frosting and sprinkled M&M minis on top. He is so excited!!

  4. Great Recipe! Thank you for sharing it. I do have some concerns about the people who couldn’t see the powder sugar amount on the list of ingredients clearly stated ABOVE the direction list and BELOW the prep times. It’s amazing you didn’t pull your hair out on how many people did not pay attention & kept asking the same questions. I worry/question these same people using a microwave to make this recipe or getting behind the wheel of a vehicle and going somewhere! I thought your ingredients list and directions were very to the point. Thank you again for sharing.

    1. LOL… I imagine that when the recipe was first printed, the amt of powdered sugar was omitted?
      But I really enjoyed your post LOL

  5. This looks amazing. I can see the amount of powered sugar needed on the list of ingredients above. Also i would love a copy or The name of the store I can buy it at. If i don’t have buttermilk is there anything i can use in its place? I seen the comment that the lady used whole Milk instead and it turned out great she said. Would u recommend whole milk? Thank you for sharing your family recipe. Kelly

    1. Kelly – powdered sugar mostly anywhere. Where do you live and I can send you link? Also, I have never used anything but buttermilk, so I can say how it would turn out. But with that being said, sounds like some have had success with whole milk. I love buttermilk and the flavor it adds so I encourage it. Enjoy!
      San